Great Belt

FIGURE 6.1 Current observations in the western Baltic Sea. DAS, DRS, OB, and W26 are permanent stations. The sampling locations are shown with their mooring identifiers. Mooring identifiers for Fehmarnbelt observations (dotted box) are given in Fig. 6.2. 

The RDANH is in charge of current measurements at the site W26 since 1995. The site was installed before the fixed link crossing the Great Belt was erected (1998) to ensure safety 

TABLE 6.1 Positions and Sampling Periods in the Great Belt (W26) and in the Fehmarnbelt Area 

Mooring Identifier Position Time Water Depth, m 

FIGURE 6.2 The sampling locations are shown with their mooring identifiers. 

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TABLE 6.2 Annual and Monthly Current Statistics for 2004 at W26, Great Belt... 

The site (DrS), which is also operated and maintained by RDANH, is located at the southern end of the shallow (< 10 m deep) Drogden Sill at the eastern entrance of the Sound. Table 6.9 shows annual and monthly average values. The technical details are the same as for W26 in the Great Belt, but here we selected the year 2005 because of having additional data from the Arkona Sea in 2005 (see Section 6.3.3). 

If a water mass with salinity 25 psu is horizontally separated from another one with 8 psu, which are typical values for the Great Belt (cf. Chapter 11), the excess pressure due to the density difference Ap at a depth of // 28 m is about Ap = App7/ a4kPa (gravity is... 

They pass through the Great Belt-Darss Sill gateway only. 

An increase in the overall species number after 1993 saline water inflow is al so obvious in the Mecklenburg Bight (stn. 012) and in the Fehmarnbelt area (stn. 010). This is not surprising since the greater amount of the saline water inflow from the North Sea enters the Baltic Sea via the Great Belt, the Fehmarnbelt and the Mecklenburg Bight. 

Another development has been used for installing in new structures, for instance the Great Belt Bridge in Denmark (Shiessl, 1993). This uses a ladder of steel specimens of known size, installed at an angle through the concrete cover. As the chloride (or carbonation) front advances each specimen becomes active and the current flow from the anodic specimen to its adjacent cathodic specimen can be monitored along with the reference electrode potential. This system is discussed fully in the Chapter5. 

Compared with North America very few plants exist in Europe for manufacturing FBECR. The extensive use of waterproof membranes had minimized the problem of potholes on bridge decks. However, massive deck and joint repairs have been necessary over the last few years on many elevated sections of UK motorways due to chloride penetration through and round the ends of membranes. The first major European project to specify FBECR was the Great Belt Tunnel. This application is described in the next section. 

Construction works are in progress to establish a fixed link across the Storebaelt (Great Belt) between the Danish islands Fyn and Sjaelland. This link consists of ... 

The authority responsible for construction of the project is Aktieselskabet Storebaeltforbindel-sen (Great Belt A.S.). The company is wholly owned by the Danish State. The contractor for the tunnel construction is MT group, an international consortium composed of the companies Monberg Thorsen A.S., Denmark, Campenon Bernard, France, DyckerhofF Widmann AG (Dywidag), Germany, and Kiewit Construction Company, USA. 

When the construction work for the tunnels was started. Great Belt A.S. had not yet provided reliable heights (first order control) for points at Sprog0 island. The available heights at this time were based on a hydrostatic levelling carried out in 1938 (Norelund, 1945). Due to a possible uplift of the Fennoscandian Shield, the old value... 

Figure 3-4 GPS levelling across the Great Belt based on a mean value of the deflection of the vertical...

Madsen, F., Tscherning, Chr. (1990) The Use of Height Differences Determined by the GPS in the Construction Process of the Fixed Link across the Great Belt. Paper, FIG XIX International Congress, Helsinki. 

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